It doesn't take long to get answers round here! Thanks to Ray Noble we now know exactly where that private car park that was confusing me was located. It was pretty much in the middle of what is now Hibbert Lane, see the two photos below. Notice the circular "thing" at the apex of the garage on the right - amazingly it is still there. Also the down pipes and soil pipes at the back of the news agents on the left all tie up nicely. So the houses in the middle are the ones demolished to make way for the road. Well done Ray!